Genetic elements for selection, deletion mutagenesis and complementation in Francisella spp |
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Authors: | Ludu Jagjit S Nix Eli B Duplantis Barry N de Bruin Olle M Gallagher Larry A Hawley Laura M Nano Francis E |
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Institution: | Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. |
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Abstract: | Francisella novicida is a gram-negative pathogen that can induce disease in mice that mimics human tularemia, and is nearly identical to Francisella tularensis at the genomic level. In this work a number of antibiotic marker cassettes that incorporate a strong F. novicida promoter is constructed, which greatly enhances selection in F. novicida and F. tularensis. Two low-copy plasmid vectors based on a broad-host-range plasmid, and an integrating vector have also been made, and these can be used for genetic complementation. Two general approaches to deletion mutagenesis in F. novicida is also described. |
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Keywords: | Francisella tularensis novicida tularemia counter-selection plasmid |
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